Electric motor drive for web printing, longitudinal folding and transverse cutting mechanism



Nov. 8, 1932. c. B. COTTRELL, 3D 1,886,525

' ELECTRIC MOTOR DRIVE FOR WEB PRINTING, LONGITUDINAL FOLDING, ANDTRANSVERSE CUTTING MECHANISM Filed July 5, 1929 3 Sheets-Sheet 1ATTORNEYS 0 0 O o gy! M7? 2. .41

NOV. 8, c B COTTRELL 3 ELECTRIC MOTOR DRIVE FOR WEB PRINTING,'LONGITUDINAL FOLDING, AND TRANSVERSE CUTTING MECHANISM Filed July-3., 1929 3Sheets-Sheet 2 'IPIVENT'OIR- I "ATTORNEY I 1932- c. B. COTTRELL, 8D1,886,525

ELECTRIC MOTOR DRIVE FOR WEB PRINTING, LONGITUDINAL FOLDING, ANDTRANSVERSE CUTTING MECHANISM Filed July 3. 1929 3 Sheets-Sheet 5INVENTOR 3 ATTORNEYS Patented Nov. 8, 1932 UNITED STATES PATENT; OFFICECALVERT B. COTTRELL, 813., OF WESTERI-Y, RHODE ISLAND, ASSIGNOR TO 0. B.COTTRELL & SONS COMPANY, OF WESTEBLY, RHODE ISLAND, A CORPORATION OFDELAWARE ELECTRIC MOTOR DRIVE FOR WEB PRINTING, LONGITUDINAL FOLDING ANDTBANSVERSE CUTTING MECHANISM Application filed July 3, 1929; Serial No.375,828.

My invention relates broadly to an electric motor drive for webprinting, longitudinal folding and transverse cutting mechanisms, whichdrive includes master and auxiliary motors and control means formaintaining the auxiliary motors at predetermined speeds relative to themaster motor.

My invention comprises a plural electrlc motor drive for the mechanismfor prlntmg on a running web, for the mechanism for folding the printedweb together with associated webs longitudinally into tubular form andfor the mechanism .for cutting the so folded associated webstransversely into tubular bag blanks and the mechanism for feeding theso folded web from the longitudinal folding mechanism to the cuttingmechanlsm; novel control means being provided whereby the variations inspeed of the auxiliary motors will be automatically corrected tomaintain the auxiliary motors at predetermined relative speeds withrespect to the speed of the master motor.

My invention also comprises web tenslon controlled means for varying thespeed of the auxiliary motor for the longitudinally folded associatedwebs as they are fed to the cutting mechanism and also where a pluralityof printing units are provided for varying the speed of the auxiliarymotor for one of the printing units to bring the prmtingumts 1nto properregister with respect to the web. A practical embodiment of my inventlonisrepresented in the accompanying drawings, in which Figs. 1 and 1represent a diagrammatic plan view showing the electric equipment for afour color two printing unit rotary web 40' printing press together withmeans for folding the printed web together with associated webslongitudinally into tubular form and with means for cutting the sofolded webs transversely into bag blanks;

Figs. 2 and 2 represent a diagrammatic side view of the same; and

Fig. 3 represents a detail view of the mechanism for shifting the beltwhich connects the I printing unit auxiliary motor With the rheostatcontrol device.

Fig. 4 represents one of the control mechanisms on a much larger scale.

It will be understood that the several arts of the electric equipmentshown may of any well known or approved construction.

The supply roll for the web to'be printed is denoted by 1 and the supplyrolls for the webs to be associated with the printed web are denoted by2, 3, {l and 5. The web 6 is led from the supply roll to and through thefirst printing unit which is shown as comprising an impression cylinder7 and its two coacting form cylinders 8 and 9. From thence the web 6 isled to andthrough the second printing unit which is herein shown ascomprising an impression cylinder 10 and its two coacting form cylinders11 and 12. From thence the printed web 6 is led to a point 13 where itis combined with the unprinted webs from the supply rolls 2, 3, land 5.The combined webs then pass between the rollers 14, 15 to thelongitudinal folding" device 16, of any well known or approved formwhere the so associated webs are folded longitudinally into tubularform. The so longitudinally folded webs are then passed between therolls 17, 18 which form a part of the folding mechanism. The said rollsserve to draw the associated webs through the folding device 16 and feedthem between the rotary cutters 19 and 20 of the cutting mechanism whichsevers the longitudinally folded webs transversely into sections.

The first printing unit is shown as driven by a master electric motor 21and the second noted by 24. These motors derive their power from amotor-generator 25 through its manually operated voltage control 26which controls the speeds, by varying thevoltage of the generator, orthemaster motor 21 and the normal relative speeds of the auxiliary motors22, 23, 24.

The master motor 21 drives a longitudinal shaft 27 through a bevel geardrive 28, which shaft has a bevel gear drive 29 with a cross shaft 30carrying a belt pulley 31. The shaft 32 of the auxiliary motor 22 isprovided with a cone pulley 33 which is connected by a belt 34 with acone pulley 35 of a shaft 36 which also carries a belt pulley 37.Pulleys 38,39 are carried by the rock levers 40, 41, the free ends ofwhich levers are connected by a flexi ble connection, in the presentinstance a sprocket chain 42 with a sprocket 43 carried by the axis ofthe contact arm 44 of a control rheostat 45. A driving belt 46 passesaround the pulleys 31, 37, 38, 39. Springs 47, 48 serve the doublepurpose of holding the levers 40, 41 and the rheostat arm 44 in theirneutral positions and also of holding the driving belt 46 under slighttension.

' The means for varying the tension of the web as it passes from oneprinting unit to the other printing unit to bring the printing unitsinto register with the web is as follows:

The web 6 passes over a roller 49 held under upward stress by a weightedflexible connection 50 tending to take up the slack in the web betweenthe two printing units. This roller 49 is connected by a rod 51 with abell crank lever 52 which, in turn, is connected by a rod 53 with a beltshifting fork 54 which embraces the belt 34. -The web .6 on its way fromthe first printing unit to the roller 49 passes between rollers 55, 56carried by a two armed lever 57, 58 which is provided with a handmicrometer adjustment 59.

The shaft 27 is connected to a short vertical shaft 60 by a bevel geardriving connection 61 and the shaft 60 is connected to a longitudinalshaft 62 by a bevel gear driving connection 63. This longitudinal shaft62 is connected to a transverse shaft 63* through a driving connection64, which shaft carries a belt pulley 65. The shaft 66 of the auxiliarymotor 23 carries a cone pulley 67 which is connected by a belt 68 with areverse cone ulley 69 on a shaft 70 which also carries a Belt pulley 71.Pulleys 72,73 are carried by rock levers 74, 75, the free ends of whichare connected by a flexible connection. in the present instance asprocket chain 77 with a sprocket 78 on the shaft of the contact arm 79of the control rheostat 80. A driving belt 81 passes around the pulleys65. 71, 72. 73. Springs 82, 83 serve the double purpose of holding thelevers 74. 75 and rheostat arm 79 in their neutral positions and alsoofholding the driving belt 81 under slight tension.

The shaft 62 is also connected to a. transverse shaft 84 through a bevelgear driving connection 85. which shaft carries a belt pulley 86. Theshaft 87 of the auxiliary motor 24 carries a cone pulley 88 which isconnected by a belt 89 with a reverse cone pulley 90 on a shaft 91.which shaft also earries a belt pulley 92. Pulleys 93, 94 are carried bytwo rock levers 95, 96. the free ends of which are connected by aflexible connection. in the present instance a sprocket chain 97 with asprocket 98 carried by the shaft of the contact arm 99 of the controlrheostat 100. A belt 101 passes around the pulleys 86, 92, 93, 94.Springs 102, 103 serve the double purpose of holding the levers 95, 96and rheostat arm 99 in their neutral positions and also of holding thedriving belt 101 under slight tension.

The web tension controlled means for controlling the movement of thebelt 89 on its reverse cone pulleys 88, 90, is herein shown as a roller104 held under upward stress by a weighted flexible connection 105tending to take up the slack in the associated and folded-webs as theypass from the folding mechanism to the cutting mechanism. This roller104 is connected by a rod 106 with a bell crank lever 107 which, inturn, is connected to a belt" shifting yoke 108 which embraces the belt89.

The control mechanisms per se hereinabove described form the subjectmatter of my copending application filed of even date herewith, itsSerial Number being 375,827.

The operation'of the device is as follows:

When the auxiliary motor 22 of the printing mechanism is running at apredetermined speed with respect to the master motor 21, the rock levers40, 41 and rheostat arm 44 are held in their neutral positions. Shouldthe auxiliary motor start to run ahead or behind the additional pull onthe belt 46 in the one or the other direction will cause the rock leversto move in opposite directions, thereby causing the rheostat arm 44 tomove along its contacts in the one or the other direction from itsneutral position, thereby causing the auxiliary motor to slow down orspeed up to its predetermined relative speed with respect to the mastermotor. Y

Should the web thus run ahead or behind between the two printing unitsthe additional compensating device will come into action to shift thebelt 34 to vary the speed of the auxiliary motor 22. The micrometeradjustment hereinabove described is used for bringing the two printingunit-sinto register on the web.

The compensating devices for the web cutting and feeding mechanisms workquite similarly to control the movements of the auxiliary motors 23 and24. The auxiliary motor 24 is also controlled by the web tension meansto vary its speed as required, to properly feed the folded andassociated webs to the cutting mechanism.

From the above description it will be seen that any variation in thespeeds of the auxiliary motors will be automatically correct ed to bringthem into their relative speeds with respect to the master motor andalso that any variation in the register in the first and second printingunits can be compensatis in operation.

While I have illustrated my invention in connection with a two printingunit four color printing press it is evident that I do not Wish to limitmyself to such a press but contemplate the use of my invent on inconnection with various types of presses Where the equipment isapplicable.

What I claim is 2- i 1. Web printing and longitudinal folding mechanismsand an electric motor drive therefor, including a source of currentsupply, a master motor for the printing mechanism and an auxiliary motorfor the folding mechanism, and means for maintaining the auxiliary motorat a predetermined "speed relative to the master motor.

2. Web printing and longitudinal folding mechanisms and an electricmotor. drive therefor, including a source of current supply, a mastermotor for the printing mechanism and an auxiliary motor for the fold ingmechanism, and means including an automatically controlled rheostat formaintaining the auxiliary motor at a predetermined speed relative to themaster motor.

3. Web printing, longitudinal folding and transverse cutting mechanismsand an electric motor drive therefor, including a source of currentsupply, a master motor for the printing mechanism and auxiliary motorsfor the folding and cutting mechanisms, and means for maintaining theauxiliary motors at predetermined speeds relative to the master motor.

4. Web printing, longitudinal folding and transverse cutting mechanismsand an elec trio motor drive therefor,including a source of currentsupply, a master motor for the printing mechanism and auxiliary motorsfor the folding and cutting mechanisms, and means includingautomatically controlled rheostats for maintaining the auxiliary motorsat predetermined speeds relative to the master motor.

5. Web printing, longitudinal folding, feeding and transverse cuttingmechanisms and an electric motor drive therefor including a source ofcurrent supply, a master motor for the printing mechanism and auxiliarymotors for the folding, feeding and cutting mechanisms, and means formaintaining the auxiliary motors at predetermined speeds relative to themaster motor.

6. Web printing, longitudinal folding, feeding and transverse cuttingmechanisms and an electric motor drive therefor includ ing a source ofcurrent supply, a master motor for the printing mechanism and auxiliarymotors for the folding, feeding and cutting mechanisms, and meansincluding automatically controlled rheostats for maintaining theauxiliary motors at predetermined speeds relative to the master motor.

ed for by adjusting screw 57 While the press '7. Web printing,longitudinal folding, feeding and transverse cutting mecha and anelectric motor drive therefor including a source of current supply, amaster motor for the printing mechanism and auxiliary motors for thefolding, feeding and cutting mechanisms, means for maintaining theauxiliary motors at predetermined s eeds relative to the master motor,and we tension means for varying the speed of the auxiliar motor for theWeb feeding mechanism.

8. Weh printing, longitudinal folding, feeding and transverse cuttingmechanisms and an electric motor drive therefor, includ-.' ing a sourceof current supply, a master motor for the printing mechanism andauxiliary motors for the folding, feeding and cutting mechanisms, meansincluding automatically controlled rheost-ats for maintaining theauxiliary motors at predetermined speeds relative to the master motor,and web tension means for; varying the speed of the auxiliary motor forthe web feeding mechanism.

In testimony, that I claim the foregoing as my invention, 1 have signedmy name this 26th day of June 1929.

CALVERT B. COTTRELL, 3m).

